Page 140 - 《精细化工》2021年第4期

第 38 卷第 4 期 精 细 化 工 Vol.38, No.4
202 1 年 4 月 FINE CHEMICALS Apr. 2021

电子化学品
氟化硅氧烷改性环氧树脂的制备与性能

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狄凯莹 ，吕佳帅男 ，蔡鹏麟 ，陈晓婷 ，徐建民 ，辛金菲
（1. 天津科技大学 化工与材料学院，天津 300457；2. 天津日津科技有限公司，天津 300300）
摘要：首先，以全氟(2-甲基-3-氧杂己基)氟化物（六氟环氧丙烷二聚体）和 N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷
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（KH792）为原料制备一种氟化硅氧烷，用 FTIR 和 HNMR 表征其结构。然后，将氟化硅氧烷与聚醚胺共同固
化环氧树脂 DGEBA（双酚 A 型二缩水甘油醚），测试了改性环氧树脂复合材料的性能。结果表明，与未改性环
氧树脂相比，加入氟化硅氧烷使含氟量 1%（以 DGEBA 质量计）改性环氧树脂复合材料的表面静态水接触角由
72.0°增至 103.2°，表面能由（42.08±2.17）mN/m 降至（20.55±1.45）mN/m，40 d 吸水率由 1.75%降至 1.38%，
有效提高了材料的疏水性；介电常数由 3.83 降低至 3.63；材料热分解 5%温度由 339 ℃升高至 347 ℃；拉伸及
弯曲力学性能分别提高了 8.5%及 7.7%。含氟量为 1%时，改性环氧树脂复合材料的综合性能最佳，差式量热扫
描和动态力学性能测试结果表明，少量改性剂可以促进环氧树脂的固化反应，提高固化度和交联密度；当氟化
硅氧烷添加量增加时，材料内部发生显著的微相分离并导致性能逐渐下降。
关键词：氟化硅氧烷；改性；环氧树脂；疏水性；微相分离；电子化学品
中图分类号：TQ323.5 文献标识码：A
文章编号：1003-5214 (2021) 04-0774-08 开放科学 (资源服务) 标识码 (OSID)：

Preparation and properties of fluorinated siloxane modified epoxy resins

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DI Kaiying , LYU Jiashuainan , CAI Penglin , CHEN Xiaoting , XU Jianmin , XIN Jinfei
（1. College of Material Science and Chemical Engineering, Tianjin University of Science & Technology, Tianjin
300457, China; 2. Tianjin Rijin Technology Co., Ltd., Tianjin 300300, China）
Abstract: A fluorinated siloxane was prepared from 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)-
propanoylfluorid (hexafluoropropylene oxide dimer) and N-(β-aminoethyl)-γ-aminopropyltrimethyl
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oxysilane (KH792), and characterized by FTIR and HNMR. Fluorinated siloxane and polyetheramine
were used to cure epoxy resin. The properties of the modified epoxy resin composites were tested. The
results showed that the addition of fluorinated siloxane improved the hydrophobicity of the material.
The static water contact angle of the material surface from 72.0° to 103.2°, the surface energy
decreased from (42.08±2.17) mN/m to (20.55±1.45) mN/m, and the water absorption rate (40 d) was
reduced from 1.75% to 1.38% compared with those of the unmodified epoxy resin. Furthermore, the
dielectric constant was reduced from 3.83 to 3.63, the thermal decomposition temperature (T 5% ) of the
material was increased from 339 ℃ to 347 ℃. The tensile and bending mechanical properties were
increased by 8.5% and 7.7%, respectively. When the fluorine element was 1% of epoxy resin mass, the
comprehensive performance of the modified epoxy resin composite was the best. DSC and DMA
results showed that a small amount of modifier could promote the curing reaction of epoxy resin and
improve curing degree and cross-linking density. While the addition of fluorinated siloxane increased,
significant microphase separation occurred inside the material and the performance gradually
decreased.
Key words: fluorinated siloxane; modification; epoxy resin; hydrophobicity; microphase separation;
electronic chemicals

收稿日期：2020-08-18; 定用日期：2020-10-12; DOI: 10.13550/j.jxhg.20200770
作者简介：狄凯莹（1996—），女，硕士生，E-mail：897371372@qq.com。联系人：陈晓婷（1972—），女，副教授，E-mail：chenxt@
tust.edu.cn。